The Year in Photos

December 22, 2012 |Chronicle staff photos

A look back at the events that shaped 2012

Karen Warren/Houston Chronicle

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Bo the dog is anesthetized for his radiation treatment in the Tomo Therapy machine at Texas A&M's Veterinary Medicine College Thursday, April 12, 2012, in College Station. Texas A&M's Veterinary Medicine College is one of only two places in the country that offers tomo therapy - a cutting edge cancer treatment for animals.

Karen Warren/Houston Chronicle

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Bo the dog is anesthetized for his radiation treatment in the Tomo Therapy machine at Texas A&M's Veterinary Medicine College Thursday, April 12, 2012, in College Station. Texas A&M's Veterinary Medicine College is one of only two places in the country that offers tomo therapy - a cutting edge cancer treatment for animals.